Listers - Reading 'new' versus 'old' oils thread reminded me of my
experience with a Mk2 Cooper S. The engine was rebuilt - crank re-grind,
bearings, new oil pump - no expense spared. Oil pressure was excellent,
although it ran without an oil cooler, using Castrol GTX 20/50. At the
suggestion of a friend, I tried a new fangled oil. After about 30 miles at
70 mph on a motorway, oil pressure was disappearing fast. I was close to
tears. I came off the motorway and changed the oil at a helpful service
station. The 'new' oil came out like water. I refilled with 20/50 - no
problem - oil pressure back to normal. The engine in my 73 TR6 is of a
similar vintage; I would not contemplate using a 'new' oil.
Ian Viles (Derbyshire, UK)
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